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Re: Are Roof Top Units considered Dead or Live Loads?

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Dan-
If you are designing with wood framing, ask yourself if you think it might be there continuously for more than ten years.  If so, the NDS will require you to use a Cd=0.9, the same as Dead Load.  On this basis, I always consider roof top equipment as "Dead Loads" keeping the LL as a reserve for the dumb things owners sometimes do.
Regards,
Bill Cain  SE
Berkeley CA
 
 
In a message dated 1/4/2005 6:58:22 AM Pacific Standard Time, dboltz(--nospam--at)1st.net writes:
I've had different answers from various Senior Engineers.  Some say that since the RTU weight does not vary in magnitude and location, it is a DEAD LOAD.  Others say that if the RTU is changed or moved in the future, it's weight and location would be considered a LIVE LOAD. 

Any help is appreciated.
--Dan




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Regards,
Bill Cain, S.E.
Berkeley CA